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1/***************************************************************************
2 * Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
3 * *
4 * This program is free software; you can redistribute it and/or modify *
5 * it under the terms of the GNU General Public License as published by *
6 * the Free Software Foundation; either version 2 of the License, or *
7 * (at your option) any later version. *
8 * *
9 * This program is distributed in the hope that it will be useful, *
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
12 * GNU General Public License for more details. *
13 * *
14 * You should have received a copy of the GNU General Public License *
15 * along with this program; if not, write to the *
16 * Free Software Foundation, Inc., *
17 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
18 ***************************************************************************/
19
20#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/slab.h>
25#include <linux/jiffies.h>
26#include <linux/platform_device.h>
27#include <linux/hwmon.h>
28#include <linux/hwmon-sysfs.h>
29#include <linux/err.h>
30#include <linux/mutex.h>
31#include "sch56xx-common.h"
32
33#define DRVNAME "sch5627"
34#define DEVNAME DRVNAME /* We only support one model */
35
36#define SCH5627_HWMON_ID 0xa5
37#define SCH5627_COMPANY_ID 0x5c
38#define SCH5627_PRIMARY_ID 0xa0
39
40#define SCH5627_REG_BUILD_CODE 0x39
41#define SCH5627_REG_BUILD_ID 0x3a
42#define SCH5627_REG_HWMON_ID 0x3c
43#define SCH5627_REG_HWMON_REV 0x3d
44#define SCH5627_REG_COMPANY_ID 0x3e
45#define SCH5627_REG_PRIMARY_ID 0x3f
46#define SCH5627_REG_CTRL 0x40
47
48#define SCH5627_NO_TEMPS 8
49#define SCH5627_NO_FANS 4
50#define SCH5627_NO_IN 5
51
52static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
53 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
54static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
55 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
56static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
57 0, 0, 1, 1, 0, 0, 0, 1 };
58static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
59 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
60static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
61 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
62
63static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
64 0x2C, 0x2E, 0x30, 0x32 };
65static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
66 0x62, 0x64, 0x66, 0x68 };
67
68static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
69 0x22, 0x23, 0x24, 0x25, 0x189 };
70static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
71 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
72static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
73 1, 0, 1, 0, 1 };
74static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
75 10745, 3660, 9765, 10745, 3660 };
76static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
77 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
78
79struct sch5627_data {
80 unsigned short addr;
81 struct device *hwmon_dev;
82 u8 control;
83 u8 temp_max[SCH5627_NO_TEMPS];
84 u8 temp_crit[SCH5627_NO_TEMPS];
85 u16 fan_min[SCH5627_NO_FANS];
86
87 struct mutex update_lock;
88 unsigned long last_battery; /* In jiffies */
89 char valid; /* !=0 if following fields are valid */
90 unsigned long last_updated; /* In jiffies */
91 u16 temp[SCH5627_NO_TEMPS];
92 u16 fan[SCH5627_NO_FANS];
93 u16 in[SCH5627_NO_IN];
94};
95
96static struct sch5627_data *sch5627_update_device(struct device *dev)
97{
98 struct sch5627_data *data = dev_get_drvdata(dev);
99 struct sch5627_data *ret = data;
100 int i, val;
101
102 mutex_lock(&data->update_lock);
103
104 /* Trigger a Vbat voltage measurement every 5 minutes */
105 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
106 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
107 data->control | 0x10);
108 data->last_battery = jiffies;
109 }
110
111 /* Cache the values for 1 second */
112 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
113 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
114 val = sch56xx_read_virtual_reg12(data->addr,
115 SCH5627_REG_TEMP_MSB[i],
116 SCH5627_REG_TEMP_LSN[i],
117 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
118 if (unlikely(val < 0)) {
119 ret = ERR_PTR(val);
120 goto abort;
121 }
122 data->temp[i] = val;
123 }
124
125 for (i = 0; i < SCH5627_NO_FANS; i++) {
126 val = sch56xx_read_virtual_reg16(data->addr,
127 SCH5627_REG_FAN[i]);
128 if (unlikely(val < 0)) {
129 ret = ERR_PTR(val);
130 goto abort;
131 }
132 data->fan[i] = val;
133 }
134
135 for (i = 0; i < SCH5627_NO_IN; i++) {
136 val = sch56xx_read_virtual_reg12(data->addr,
137 SCH5627_REG_IN_MSB[i],
138 SCH5627_REG_IN_LSN[i],
139 SCH5627_REG_IN_HIGH_NIBBLE[i]);
140 if (unlikely(val < 0)) {
141 ret = ERR_PTR(val);
142 goto abort;
143 }
144 data->in[i] = val;
145 }
146
147 data->last_updated = jiffies;
148 data->valid = 1;
149 }
150abort:
151 mutex_unlock(&data->update_lock);
152 return ret;
153}
154
155static int __devinit sch5627_read_limits(struct sch5627_data *data)
156{
157 int i, val;
158
159 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
160 /*
161 * Note what SMSC calls ABS, is what lm_sensors calls max
162 * (aka high), and HIGH is what lm_sensors calls crit.
163 */
164 val = sch56xx_read_virtual_reg(data->addr,
165 SCH5627_REG_TEMP_ABS[i]);
166 if (val < 0)
167 return val;
168 data->temp_max[i] = val;
169
170 val = sch56xx_read_virtual_reg(data->addr,
171 SCH5627_REG_TEMP_HIGH[i]);
172 if (val < 0)
173 return val;
174 data->temp_crit[i] = val;
175 }
176 for (i = 0; i < SCH5627_NO_FANS; i++) {
177 val = sch56xx_read_virtual_reg16(data->addr,
178 SCH5627_REG_FAN_MIN[i]);
179 if (val < 0)
180 return val;
181 data->fan_min[i] = val;
182 }
183
184 return 0;
185}
186
187static int reg_to_temp(u16 reg)
188{
189 return (reg * 625) / 10 - 64000;
190}
191
192static int reg_to_temp_limit(u8 reg)
193{
194 return (reg - 64) * 1000;
195}
196
197static int reg_to_rpm(u16 reg)
198{
199 if (reg == 0)
200 return -EIO;
201 if (reg == 0xffff)
202 return 0;
203
204 return 5400540 / reg;
205}
206
207static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
208 char *buf)
209{
210 return snprintf(buf, PAGE_SIZE, "%s\n", DEVNAME);
211}
212
213static ssize_t show_temp(struct device *dev, struct device_attribute
214 *devattr, char *buf)
215{
216 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
217 struct sch5627_data *data = sch5627_update_device(dev);
218 int val;
219
220 if (IS_ERR(data))
221 return PTR_ERR(data);
222
223 val = reg_to_temp(data->temp[attr->index]);
224 return snprintf(buf, PAGE_SIZE, "%d\n", val);
225}
226
227static ssize_t show_temp_fault(struct device *dev, struct device_attribute
228 *devattr, char *buf)
229{
230 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
231 struct sch5627_data *data = sch5627_update_device(dev);
232
233 if (IS_ERR(data))
234 return PTR_ERR(data);
235
236 return snprintf(buf, PAGE_SIZE, "%d\n", data->temp[attr->index] == 0);
237}
238
239static ssize_t show_temp_max(struct device *dev, struct device_attribute
240 *devattr, char *buf)
241{
242 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
243 struct sch5627_data *data = dev_get_drvdata(dev);
244 int val;
245
246 val = reg_to_temp_limit(data->temp_max[attr->index]);
247 return snprintf(buf, PAGE_SIZE, "%d\n", val);
248}
249
250static ssize_t show_temp_crit(struct device *dev, struct device_attribute
251 *devattr, char *buf)
252{
253 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
254 struct sch5627_data *data = dev_get_drvdata(dev);
255 int val;
256
257 val = reg_to_temp_limit(data->temp_crit[attr->index]);
258 return snprintf(buf, PAGE_SIZE, "%d\n", val);
259}
260
261static ssize_t show_fan(struct device *dev, struct device_attribute
262 *devattr, char *buf)
263{
264 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
265 struct sch5627_data *data = sch5627_update_device(dev);
266 int val;
267
268 if (IS_ERR(data))
269 return PTR_ERR(data);
270
271 val = reg_to_rpm(data->fan[attr->index]);
272 if (val < 0)
273 return val;
274
275 return snprintf(buf, PAGE_SIZE, "%d\n", val);
276}
277
278static ssize_t show_fan_fault(struct device *dev, struct device_attribute
279 *devattr, char *buf)
280{
281 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
282 struct sch5627_data *data = sch5627_update_device(dev);
283
284 if (IS_ERR(data))
285 return PTR_ERR(data);
286
287 return snprintf(buf, PAGE_SIZE, "%d\n",
288 data->fan[attr->index] == 0xffff);
289}
290
291static ssize_t show_fan_min(struct device *dev, struct device_attribute
292 *devattr, char *buf)
293{
294 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
295 struct sch5627_data *data = dev_get_drvdata(dev);
296 int val = reg_to_rpm(data->fan_min[attr->index]);
297 if (val < 0)
298 return val;
299
300 return snprintf(buf, PAGE_SIZE, "%d\n", val);
301}
302
303static ssize_t show_in(struct device *dev, struct device_attribute
304 *devattr, char *buf)
305{
306 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
307 struct sch5627_data *data = sch5627_update_device(dev);
308 int val;
309
310 if (IS_ERR(data))
311 return PTR_ERR(data);
312
313 val = DIV_ROUND_CLOSEST(
314 data->in[attr->index] * SCH5627_REG_IN_FACTOR[attr->index],
315 10000);
316 return snprintf(buf, PAGE_SIZE, "%d\n", val);
317}
318
319static ssize_t show_in_label(struct device *dev, struct device_attribute
320 *devattr, char *buf)
321{
322 struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
323
324 return snprintf(buf, PAGE_SIZE, "%s\n",
325 SCH5627_IN_LABELS[attr->index]);
326}
327
328static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
329static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
330static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
331static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
332static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
333static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
334static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
335static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
336static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
337static SENSOR_DEVICE_ATTR(temp1_fault, S_IRUGO, show_temp_fault, NULL, 0);
338static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_temp_fault, NULL, 1);
339static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_temp_fault, NULL, 2);
340static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_temp_fault, NULL, 3);
341static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_temp_fault, NULL, 4);
342static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_temp_fault, NULL, 5);
343static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_temp_fault, NULL, 6);
344static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_temp_fault, NULL, 7);
345static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO, show_temp_max, NULL, 0);
346static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO, show_temp_max, NULL, 1);
347static SENSOR_DEVICE_ATTR(temp3_max, S_IRUGO, show_temp_max, NULL, 2);
348static SENSOR_DEVICE_ATTR(temp4_max, S_IRUGO, show_temp_max, NULL, 3);
349static SENSOR_DEVICE_ATTR(temp5_max, S_IRUGO, show_temp_max, NULL, 4);
350static SENSOR_DEVICE_ATTR(temp6_max, S_IRUGO, show_temp_max, NULL, 5);
351static SENSOR_DEVICE_ATTR(temp7_max, S_IRUGO, show_temp_max, NULL, 6);
352static SENSOR_DEVICE_ATTR(temp8_max, S_IRUGO, show_temp_max, NULL, 7);
353static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO, show_temp_crit, NULL, 0);
354static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO, show_temp_crit, NULL, 1);
355static SENSOR_DEVICE_ATTR(temp3_crit, S_IRUGO, show_temp_crit, NULL, 2);
356static SENSOR_DEVICE_ATTR(temp4_crit, S_IRUGO, show_temp_crit, NULL, 3);
357static SENSOR_DEVICE_ATTR(temp5_crit, S_IRUGO, show_temp_crit, NULL, 4);
358static SENSOR_DEVICE_ATTR(temp6_crit, S_IRUGO, show_temp_crit, NULL, 5);
359static SENSOR_DEVICE_ATTR(temp7_crit, S_IRUGO, show_temp_crit, NULL, 6);
360static SENSOR_DEVICE_ATTR(temp8_crit, S_IRUGO, show_temp_crit, NULL, 7);
361
362static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
363static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
364static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
365static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
366static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, show_fan_fault, NULL, 0);
367static SENSOR_DEVICE_ATTR(fan2_fault, S_IRUGO, show_fan_fault, NULL, 1);
368static SENSOR_DEVICE_ATTR(fan3_fault, S_IRUGO, show_fan_fault, NULL, 2);
369static SENSOR_DEVICE_ATTR(fan4_fault, S_IRUGO, show_fan_fault, NULL, 3);
370static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO, show_fan_min, NULL, 0);
371static SENSOR_DEVICE_ATTR(fan2_min, S_IRUGO, show_fan_min, NULL, 1);
372static SENSOR_DEVICE_ATTR(fan3_min, S_IRUGO, show_fan_min, NULL, 2);
373static SENSOR_DEVICE_ATTR(fan4_min, S_IRUGO, show_fan_min, NULL, 3);
374
375static SENSOR_DEVICE_ATTR(in0_input, S_IRUGO, show_in, NULL, 0);
376static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_in, NULL, 1);
377static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_in, NULL, 2);
378static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_in, NULL, 3);
379static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_in, NULL, 4);
380static SENSOR_DEVICE_ATTR(in0_label, S_IRUGO, show_in_label, NULL, 0);
381static SENSOR_DEVICE_ATTR(in1_label, S_IRUGO, show_in_label, NULL, 1);
382static SENSOR_DEVICE_ATTR(in2_label, S_IRUGO, show_in_label, NULL, 2);
383static SENSOR_DEVICE_ATTR(in3_label, S_IRUGO, show_in_label, NULL, 3);
384
385static struct attribute *sch5627_attributes[] = {
386 &dev_attr_name.attr,
387
388 &sensor_dev_attr_temp1_input.dev_attr.attr,
389 &sensor_dev_attr_temp2_input.dev_attr.attr,
390 &sensor_dev_attr_temp3_input.dev_attr.attr,
391 &sensor_dev_attr_temp4_input.dev_attr.attr,
392 &sensor_dev_attr_temp5_input.dev_attr.attr,
393 &sensor_dev_attr_temp6_input.dev_attr.attr,
394 &sensor_dev_attr_temp7_input.dev_attr.attr,
395 &sensor_dev_attr_temp8_input.dev_attr.attr,
396 &sensor_dev_attr_temp1_fault.dev_attr.attr,
397 &sensor_dev_attr_temp2_fault.dev_attr.attr,
398 &sensor_dev_attr_temp3_fault.dev_attr.attr,
399 &sensor_dev_attr_temp4_fault.dev_attr.attr,
400 &sensor_dev_attr_temp5_fault.dev_attr.attr,
401 &sensor_dev_attr_temp6_fault.dev_attr.attr,
402 &sensor_dev_attr_temp7_fault.dev_attr.attr,
403 &sensor_dev_attr_temp8_fault.dev_attr.attr,
404 &sensor_dev_attr_temp1_max.dev_attr.attr,
405 &sensor_dev_attr_temp2_max.dev_attr.attr,
406 &sensor_dev_attr_temp3_max.dev_attr.attr,
407 &sensor_dev_attr_temp4_max.dev_attr.attr,
408 &sensor_dev_attr_temp5_max.dev_attr.attr,
409 &sensor_dev_attr_temp6_max.dev_attr.attr,
410 &sensor_dev_attr_temp7_max.dev_attr.attr,
411 &sensor_dev_attr_temp8_max.dev_attr.attr,
412 &sensor_dev_attr_temp1_crit.dev_attr.attr,
413 &sensor_dev_attr_temp2_crit.dev_attr.attr,
414 &sensor_dev_attr_temp3_crit.dev_attr.attr,
415 &sensor_dev_attr_temp4_crit.dev_attr.attr,
416 &sensor_dev_attr_temp5_crit.dev_attr.attr,
417 &sensor_dev_attr_temp6_crit.dev_attr.attr,
418 &sensor_dev_attr_temp7_crit.dev_attr.attr,
419 &sensor_dev_attr_temp8_crit.dev_attr.attr,
420
421 &sensor_dev_attr_fan1_input.dev_attr.attr,
422 &sensor_dev_attr_fan2_input.dev_attr.attr,
423 &sensor_dev_attr_fan3_input.dev_attr.attr,
424 &sensor_dev_attr_fan4_input.dev_attr.attr,
425 &sensor_dev_attr_fan1_fault.dev_attr.attr,
426 &sensor_dev_attr_fan2_fault.dev_attr.attr,
427 &sensor_dev_attr_fan3_fault.dev_attr.attr,
428 &sensor_dev_attr_fan4_fault.dev_attr.attr,
429 &sensor_dev_attr_fan1_min.dev_attr.attr,
430 &sensor_dev_attr_fan2_min.dev_attr.attr,
431 &sensor_dev_attr_fan3_min.dev_attr.attr,
432 &sensor_dev_attr_fan4_min.dev_attr.attr,
433
434 &sensor_dev_attr_in0_input.dev_attr.attr,
435 &sensor_dev_attr_in1_input.dev_attr.attr,
436 &sensor_dev_attr_in2_input.dev_attr.attr,
437 &sensor_dev_attr_in3_input.dev_attr.attr,
438 &sensor_dev_attr_in4_input.dev_attr.attr,
439 &sensor_dev_attr_in0_label.dev_attr.attr,
440 &sensor_dev_attr_in1_label.dev_attr.attr,
441 &sensor_dev_attr_in2_label.dev_attr.attr,
442 &sensor_dev_attr_in3_label.dev_attr.attr,
443 /* No in4_label as in4 is a generic input pin */
444
445 NULL
446};
447
448static const struct attribute_group sch5627_group = {
449 .attrs = sch5627_attributes,
450};
451
452static int sch5627_remove(struct platform_device *pdev)
453{
454 struct sch5627_data *data = platform_get_drvdata(pdev);
455
456 if (data->hwmon_dev)
457 hwmon_device_unregister(data->hwmon_dev);
458
459 sysfs_remove_group(&pdev->dev.kobj, &sch5627_group);
460 platform_set_drvdata(pdev, NULL);
461 kfree(data);
462
463 return 0;
464}
465
466static int __devinit sch5627_probe(struct platform_device *pdev)
467{
468 struct sch5627_data *data;
469 int err, build_code, build_id, hwmon_rev, val;
470
471 data = kzalloc(sizeof(struct sch5627_data), GFP_KERNEL);
472 if (!data)
473 return -ENOMEM;
474
475 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
476 mutex_init(&data->update_lock);
477 platform_set_drvdata(pdev, data);
478
479 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
480 if (val < 0) {
481 err = val;
482 goto error;
483 }
484 if (val != SCH5627_HWMON_ID) {
485 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
486 val, SCH5627_HWMON_ID);
487 err = -ENODEV;
488 goto error;
489 }
490
491 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
492 if (val < 0) {
493 err = val;
494 goto error;
495 }
496 if (val != SCH5627_COMPANY_ID) {
497 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
498 val, SCH5627_COMPANY_ID);
499 err = -ENODEV;
500 goto error;
501 }
502
503 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
504 if (val < 0) {
505 err = val;
506 goto error;
507 }
508 if (val != SCH5627_PRIMARY_ID) {
509 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
510 val, SCH5627_PRIMARY_ID);
511 err = -ENODEV;
512 goto error;
513 }
514
515 build_code = sch56xx_read_virtual_reg(data->addr,
516 SCH5627_REG_BUILD_CODE);
517 if (build_code < 0) {
518 err = build_code;
519 goto error;
520 }
521
522 build_id = sch56xx_read_virtual_reg16(data->addr,
523 SCH5627_REG_BUILD_ID);
524 if (build_id < 0) {
525 err = build_id;
526 goto error;
527 }
528
529 hwmon_rev = sch56xx_read_virtual_reg(data->addr,
530 SCH5627_REG_HWMON_REV);
531 if (hwmon_rev < 0) {
532 err = hwmon_rev;
533 goto error;
534 }
535
536 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
537 if (val < 0) {
538 err = val;
539 goto error;
540 }
541 data->control = val;
542 if (!(data->control & 0x01)) {
543 pr_err("hardware monitoring not enabled\n");
544 err = -ENODEV;
545 goto error;
546 }
547 /* Trigger a Vbat voltage measurement, so that we get a valid reading
548 the first time we read Vbat */
549 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
550 data->control | 0x10);
551 data->last_battery = jiffies;
552
553 /*
554 * Read limits, we do this only once as reading a register on
555 * the sch5627 is quite expensive (and they don't change).
556 */
557 err = sch5627_read_limits(data);
558 if (err)
559 goto error;
560
561 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
562 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
563 build_code, build_id, hwmon_rev);
564
565 /* Register sysfs interface files */
566 err = sysfs_create_group(&pdev->dev.kobj, &sch5627_group);
567 if (err)
568 goto error;
569
570 data->hwmon_dev = hwmon_device_register(&pdev->dev);
571 if (IS_ERR(data->hwmon_dev)) {
572 err = PTR_ERR(data->hwmon_dev);
573 data->hwmon_dev = NULL;
574 goto error;
575 }
576
577 return 0;
578
579error:
580 sch5627_remove(pdev);
581 return err;
582}
583
584static struct platform_driver sch5627_driver = {
585 .driver = {
586 .owner = THIS_MODULE,
587 .name = DRVNAME,
588 },
589 .probe = sch5627_probe,
590 .remove = sch5627_remove,
591};
592
593static int __init sch5627_init(void)
594{
595 return platform_driver_register(&sch5627_driver);
596}
597
598static void __exit sch5627_exit(void)
599{
600 platform_driver_unregister(&sch5627_driver);
601}
602
603MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
604MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
605MODULE_LICENSE("GPL");
606
607module_init(sch5627_init);
608module_exit(sch5627_exit);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/***************************************************************************
3 * Copyright (C) 2010-2012 Hans de Goede <hdegoede@redhat.com> *
4 * *
5 ***************************************************************************/
6
7#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
9#include <linux/module.h>
10#include <linux/mod_devicetable.h>
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/jiffies.h>
14#include <linux/platform_device.h>
15#include <linux/hwmon.h>
16#include <linux/err.h>
17#include <linux/mutex.h>
18#include "sch56xx-common.h"
19
20#define DRVNAME "sch5627"
21#define DEVNAME DRVNAME /* We only support one model */
22
23#define SCH5627_HWMON_ID 0xa5
24#define SCH5627_COMPANY_ID 0x5c
25#define SCH5627_PRIMARY_ID 0xa0
26
27#define SCH5627_REG_BUILD_CODE 0x39
28#define SCH5627_REG_BUILD_ID 0x3a
29#define SCH5627_REG_HWMON_ID 0x3c
30#define SCH5627_REG_HWMON_REV 0x3d
31#define SCH5627_REG_COMPANY_ID 0x3e
32#define SCH5627_REG_PRIMARY_ID 0x3f
33#define SCH5627_REG_CTRL 0x40
34
35#define SCH5627_NO_TEMPS 8
36#define SCH5627_NO_FANS 4
37#define SCH5627_NO_IN 5
38
39static const u16 SCH5627_REG_TEMP_MSB[SCH5627_NO_TEMPS] = {
40 0x2B, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x180, 0x181 };
41static const u16 SCH5627_REG_TEMP_LSN[SCH5627_NO_TEMPS] = {
42 0xE2, 0xE1, 0xE1, 0xE5, 0xE5, 0xE6, 0x182, 0x182 };
43static const u16 SCH5627_REG_TEMP_HIGH_NIBBLE[SCH5627_NO_TEMPS] = {
44 0, 0, 1, 1, 0, 0, 0, 1 };
45static const u16 SCH5627_REG_TEMP_HIGH[SCH5627_NO_TEMPS] = {
46 0x61, 0x57, 0x59, 0x5B, 0x5D, 0x5F, 0x184, 0x186 };
47static const u16 SCH5627_REG_TEMP_ABS[SCH5627_NO_TEMPS] = {
48 0x9B, 0x96, 0x97, 0x98, 0x99, 0x9A, 0x1A8, 0x1A9 };
49
50static const u16 SCH5627_REG_FAN[SCH5627_NO_FANS] = {
51 0x2C, 0x2E, 0x30, 0x32 };
52static const u16 SCH5627_REG_FAN_MIN[SCH5627_NO_FANS] = {
53 0x62, 0x64, 0x66, 0x68 };
54
55static const u16 SCH5627_REG_PWM_MAP[SCH5627_NO_FANS] = {
56 0xA0, 0xA1, 0xA2, 0xA3 };
57
58static const u16 SCH5627_REG_IN_MSB[SCH5627_NO_IN] = {
59 0x22, 0x23, 0x24, 0x25, 0x189 };
60static const u16 SCH5627_REG_IN_LSN[SCH5627_NO_IN] = {
61 0xE4, 0xE4, 0xE3, 0xE3, 0x18A };
62static const u16 SCH5627_REG_IN_HIGH_NIBBLE[SCH5627_NO_IN] = {
63 1, 0, 1, 0, 1 };
64static const u16 SCH5627_REG_IN_FACTOR[SCH5627_NO_IN] = {
65 10745, 3660, 9765, 10745, 3660 };
66static const char * const SCH5627_IN_LABELS[SCH5627_NO_IN] = {
67 "VCC", "VTT", "VBAT", "VTR", "V_IN" };
68
69struct sch5627_data {
70 unsigned short addr;
71 u8 control;
72 u8 temp_max[SCH5627_NO_TEMPS];
73 u8 temp_crit[SCH5627_NO_TEMPS];
74 u16 fan_min[SCH5627_NO_FANS];
75
76 struct mutex update_lock;
77 unsigned long last_battery; /* In jiffies */
78 char temp_valid; /* !=0 if following fields are valid */
79 char fan_valid;
80 char in_valid;
81 unsigned long temp_last_updated; /* In jiffies */
82 unsigned long fan_last_updated;
83 unsigned long in_last_updated;
84 u16 temp[SCH5627_NO_TEMPS];
85 u16 fan[SCH5627_NO_FANS];
86 u16 in[SCH5627_NO_IN];
87};
88
89static int sch5627_update_temp(struct sch5627_data *data)
90{
91 int ret = 0;
92 int i, val;
93
94 mutex_lock(&data->update_lock);
95
96 /* Cache the values for 1 second */
97 if (time_after(jiffies, data->temp_last_updated + HZ) || !data->temp_valid) {
98 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
99 val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_TEMP_MSB[i],
100 SCH5627_REG_TEMP_LSN[i],
101 SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
102 if (unlikely(val < 0)) {
103 ret = val;
104 goto abort;
105 }
106 data->temp[i] = val;
107 }
108 data->temp_last_updated = jiffies;
109 data->temp_valid = 1;
110 }
111abort:
112 mutex_unlock(&data->update_lock);
113 return ret;
114}
115
116static int sch5627_update_fan(struct sch5627_data *data)
117{
118 int ret = 0;
119 int i, val;
120
121 mutex_lock(&data->update_lock);
122
123 /* Cache the values for 1 second */
124 if (time_after(jiffies, data->fan_last_updated + HZ) || !data->fan_valid) {
125 for (i = 0; i < SCH5627_NO_FANS; i++) {
126 val = sch56xx_read_virtual_reg16(data->addr, SCH5627_REG_FAN[i]);
127 if (unlikely(val < 0)) {
128 ret = val;
129 goto abort;
130 }
131 data->fan[i] = val;
132 }
133 data->fan_last_updated = jiffies;
134 data->fan_valid = 1;
135 }
136abort:
137 mutex_unlock(&data->update_lock);
138 return ret;
139}
140
141static int sch5627_update_in(struct sch5627_data *data)
142{
143 int ret = 0;
144 int i, val;
145
146 mutex_lock(&data->update_lock);
147
148 /* Trigger a Vbat voltage measurement every 5 minutes */
149 if (time_after(jiffies, data->last_battery + 300 * HZ)) {
150 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL, data->control | 0x10);
151 data->last_battery = jiffies;
152 }
153
154 /* Cache the values for 1 second */
155 if (time_after(jiffies, data->in_last_updated + HZ) || !data->in_valid) {
156 for (i = 0; i < SCH5627_NO_IN; i++) {
157 val = sch56xx_read_virtual_reg12(data->addr, SCH5627_REG_IN_MSB[i],
158 SCH5627_REG_IN_LSN[i],
159 SCH5627_REG_IN_HIGH_NIBBLE[i]);
160 if (unlikely(val < 0)) {
161 ret = val;
162 goto abort;
163 }
164 data->in[i] = val;
165 }
166 data->in_last_updated = jiffies;
167 data->in_valid = 1;
168 }
169abort:
170 mutex_unlock(&data->update_lock);
171 return ret;
172}
173
174static int sch5627_read_limits(struct sch5627_data *data)
175{
176 int i, val;
177
178 for (i = 0; i < SCH5627_NO_TEMPS; i++) {
179 /*
180 * Note what SMSC calls ABS, is what lm_sensors calls max
181 * (aka high), and HIGH is what lm_sensors calls crit.
182 */
183 val = sch56xx_read_virtual_reg(data->addr,
184 SCH5627_REG_TEMP_ABS[i]);
185 if (val < 0)
186 return val;
187 data->temp_max[i] = val;
188
189 val = sch56xx_read_virtual_reg(data->addr,
190 SCH5627_REG_TEMP_HIGH[i]);
191 if (val < 0)
192 return val;
193 data->temp_crit[i] = val;
194 }
195 for (i = 0; i < SCH5627_NO_FANS; i++) {
196 val = sch56xx_read_virtual_reg16(data->addr,
197 SCH5627_REG_FAN_MIN[i]);
198 if (val < 0)
199 return val;
200 data->fan_min[i] = val;
201 }
202
203 return 0;
204}
205
206static int reg_to_temp(u16 reg)
207{
208 return (reg * 625) / 10 - 64000;
209}
210
211static int reg_to_temp_limit(u8 reg)
212{
213 return (reg - 64) * 1000;
214}
215
216static int reg_to_rpm(u16 reg)
217{
218 if (reg == 0)
219 return -EIO;
220 if (reg == 0xffff)
221 return 0;
222
223 return 5400540 / reg;
224}
225
226static umode_t sch5627_is_visible(const void *drvdata, enum hwmon_sensor_types type, u32 attr,
227 int channel)
228{
229 if (type == hwmon_pwm && attr == hwmon_pwm_auto_channels_temp)
230 return 0644;
231
232 return 0444;
233}
234
235static int sch5627_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
236 long *val)
237{
238 struct sch5627_data *data = dev_get_drvdata(dev);
239 int ret;
240
241 switch (type) {
242 case hwmon_temp:
243 ret = sch5627_update_temp(data);
244 if (ret < 0)
245 return ret;
246 switch (attr) {
247 case hwmon_temp_input:
248 *val = reg_to_temp(data->temp[channel]);
249 return 0;
250 case hwmon_temp_max:
251 *val = reg_to_temp_limit(data->temp_max[channel]);
252 return 0;
253 case hwmon_temp_crit:
254 *val = reg_to_temp_limit(data->temp_crit[channel]);
255 return 0;
256 case hwmon_temp_fault:
257 *val = (data->temp[channel] == 0);
258 return 0;
259 default:
260 break;
261 }
262 break;
263 case hwmon_fan:
264 ret = sch5627_update_fan(data);
265 if (ret < 0)
266 return ret;
267 switch (attr) {
268 case hwmon_fan_input:
269 ret = reg_to_rpm(data->fan[channel]);
270 if (ret < 0)
271 return ret;
272 *val = ret;
273 return 0;
274 case hwmon_fan_min:
275 ret = reg_to_rpm(data->fan_min[channel]);
276 if (ret < 0)
277 return ret;
278 *val = ret;
279 return 0;
280 case hwmon_fan_fault:
281 *val = (data->fan[channel] == 0xffff);
282 return 0;
283 default:
284 break;
285 }
286 break;
287 case hwmon_pwm:
288 switch (attr) {
289 case hwmon_pwm_auto_channels_temp:
290 mutex_lock(&data->update_lock);
291 ret = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel]);
292 mutex_unlock(&data->update_lock);
293
294 if (ret < 0)
295 return ret;
296
297 *val = ret;
298
299 return 0;
300 default:
301 break;
302 }
303 break;
304 case hwmon_in:
305 ret = sch5627_update_in(data);
306 if (ret < 0)
307 return ret;
308 switch (attr) {
309 case hwmon_in_input:
310 *val = DIV_ROUND_CLOSEST(data->in[channel] * SCH5627_REG_IN_FACTOR[channel],
311 10000);
312 return 0;
313 default:
314 break;
315 }
316 break;
317 default:
318 break;
319 }
320
321 return -EOPNOTSUPP;
322}
323
324static int sch5627_read_string(struct device *dev, enum hwmon_sensor_types type, u32 attr,
325 int channel, const char **str)
326{
327 switch (type) {
328 case hwmon_in:
329 switch (attr) {
330 case hwmon_in_label:
331 *str = SCH5627_IN_LABELS[channel];
332 return 0;
333 default:
334 break;
335 }
336 break;
337 default:
338 break;
339 }
340
341 return -EOPNOTSUPP;
342}
343
344static int sch5627_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel,
345 long val)
346{
347 struct sch5627_data *data = dev_get_drvdata(dev);
348 int ret;
349
350 switch (type) {
351 case hwmon_pwm:
352 switch (attr) {
353 case hwmon_pwm_auto_channels_temp:
354 /* registers are 8 bit wide */
355 if (val > U8_MAX || val < 0)
356 return -EINVAL;
357
358 mutex_lock(&data->update_lock);
359 ret = sch56xx_write_virtual_reg(data->addr, SCH5627_REG_PWM_MAP[channel],
360 val);
361 mutex_unlock(&data->update_lock);
362
363 return ret;
364 default:
365 break;
366 }
367 break;
368 default:
369 break;
370 }
371
372 return -EOPNOTSUPP;
373}
374
375static const struct hwmon_ops sch5627_ops = {
376 .is_visible = sch5627_is_visible,
377 .read = sch5627_read,
378 .read_string = sch5627_read_string,
379 .write = sch5627_write,
380};
381
382static const struct hwmon_channel_info *sch5627_info[] = {
383 HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ),
384 HWMON_CHANNEL_INFO(temp,
385 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
386 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
387 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
388 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
389 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
390 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
391 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT,
392 HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | HWMON_T_FAULT
393 ),
394 HWMON_CHANNEL_INFO(fan,
395 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
396 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
397 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT,
398 HWMON_F_INPUT | HWMON_F_MIN | HWMON_F_FAULT
399 ),
400 HWMON_CHANNEL_INFO(pwm,
401 HWMON_PWM_AUTO_CHANNELS_TEMP,
402 HWMON_PWM_AUTO_CHANNELS_TEMP,
403 HWMON_PWM_AUTO_CHANNELS_TEMP,
404 HWMON_PWM_AUTO_CHANNELS_TEMP
405 ),
406 HWMON_CHANNEL_INFO(in,
407 HWMON_I_INPUT | HWMON_I_LABEL,
408 HWMON_I_INPUT | HWMON_I_LABEL,
409 HWMON_I_INPUT | HWMON_I_LABEL,
410 HWMON_I_INPUT | HWMON_I_LABEL,
411 HWMON_I_INPUT
412 ),
413 NULL
414};
415
416static const struct hwmon_chip_info sch5627_chip_info = {
417 .ops = &sch5627_ops,
418 .info = sch5627_info,
419};
420
421static int sch5627_probe(struct platform_device *pdev)
422{
423 struct sch5627_data *data;
424 struct device *hwmon_dev;
425 int err, build_code, build_id, hwmon_rev, val;
426
427 data = devm_kzalloc(&pdev->dev, sizeof(struct sch5627_data),
428 GFP_KERNEL);
429 if (!data)
430 return -ENOMEM;
431
432 data->addr = platform_get_resource(pdev, IORESOURCE_IO, 0)->start;
433 mutex_init(&data->update_lock);
434 platform_set_drvdata(pdev, data);
435
436 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
437 if (val < 0)
438 return val;
439
440 if (val != SCH5627_HWMON_ID) {
441 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "hwmon",
442 val, SCH5627_HWMON_ID);
443 return -ENODEV;
444 }
445
446 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
447 if (val < 0)
448 return val;
449
450 if (val != SCH5627_COMPANY_ID) {
451 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "company",
452 val, SCH5627_COMPANY_ID);
453 return -ENODEV;
454 }
455
456 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
457 if (val < 0)
458 return val;
459
460 if (val != SCH5627_PRIMARY_ID) {
461 pr_err("invalid %s id: 0x%02X (expected 0x%02X)\n", "primary",
462 val, SCH5627_PRIMARY_ID);
463 return -ENODEV;
464 }
465
466 build_code = sch56xx_read_virtual_reg(data->addr,
467 SCH5627_REG_BUILD_CODE);
468 if (build_code < 0)
469 return build_code;
470
471 build_id = sch56xx_read_virtual_reg16(data->addr,
472 SCH5627_REG_BUILD_ID);
473 if (build_id < 0)
474 return build_id;
475
476 hwmon_rev = sch56xx_read_virtual_reg(data->addr,
477 SCH5627_REG_HWMON_REV);
478 if (hwmon_rev < 0)
479 return hwmon_rev;
480
481 val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
482 if (val < 0)
483 return val;
484
485 data->control = val;
486 if (!(data->control & 0x01)) {
487 pr_err("hardware monitoring not enabled\n");
488 return -ENODEV;
489 }
490 /* Trigger a Vbat voltage measurement, so that we get a valid reading
491 the first time we read Vbat */
492 sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
493 data->control | 0x10);
494 data->last_battery = jiffies;
495
496 /*
497 * Read limits, we do this only once as reading a register on
498 * the sch5627 is quite expensive (and they don't change).
499 */
500 err = sch5627_read_limits(data);
501 if (err)
502 return err;
503
504 pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
505 pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
506 build_code, build_id, hwmon_rev);
507
508 hwmon_dev = devm_hwmon_device_register_with_info(&pdev->dev, DEVNAME, data,
509 &sch5627_chip_info, NULL);
510 if (IS_ERR(hwmon_dev))
511 return PTR_ERR(hwmon_dev);
512
513 /* Note failing to register the watchdog is not a fatal error */
514 sch56xx_watchdog_register(&pdev->dev, data->addr,
515 (build_code << 24) | (build_id << 8) | hwmon_rev,
516 &data->update_lock, 1);
517
518 return 0;
519}
520
521static const struct platform_device_id sch5627_device_id[] = {
522 {
523 .name = "sch5627",
524 },
525 { }
526};
527MODULE_DEVICE_TABLE(platform, sch5627_device_id);
528
529static struct platform_driver sch5627_driver = {
530 .driver = {
531 .name = DRVNAME,
532 },
533 .probe = sch5627_probe,
534 .id_table = sch5627_device_id,
535};
536
537module_platform_driver(sch5627_driver);
538
539MODULE_DESCRIPTION("SMSC SCH5627 Hardware Monitoring Driver");
540MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
541MODULE_LICENSE("GPL");